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Check out which companies are making headlines before the bell on Thursday:

ConAgra — The company reported fiscal fourth quarter profit of 60 cents per share, excluding certain items, a cent above estimates. Revenue was essentially in line with consensus. The food producer said it is benefiting from its Ralcorp acquisition, but is facing some profit headwinds in its commercial foods segment.

Merck —The drug giant is selling a manufacturing business and options on 11 products to Aspen Group in a $1 billion deal.

McCormick — The spice maker reported quarterly profit of 61 cents per share, excluding certain items, in line with estimates. Revenue was also in line, but the company lowered its full year earnings estimate to reflect weakness in its industrial markets.

Winnebago —The recreational vehicle maker's third quarter profit of 27 cents per share was in line with estimates, with revenue checking in well above consensus. Net income nearly doubled from a year ago, thanks to increased sales volume and fewer incentives.

Clearwire Dish Network is dropping its bid to buy the wireless service provider. That clears the way for Sprint to buy the part of Clearwire it doesn't already own.

Bed Bath & Beyond —The home retail chain reported fiscal first quarter profit of 93 cents per share, in line with estimates, with revenue also in line. The retailer has been reporting improved profits in prior quarters, though profit did slip slightly this time around.

Men's Wearhouse — Founder George Zimmer has fired the latest volley in the war of words with the company he founded, disputing the clothing retailer's contention that he pushed to take the company private in an effort to regain control. Zimmer was recently ousted as the company's executive chairman.

HD Supply —The company priced its initial public offering at $18/share, considerably below the projected $22 - $25 per share price range. HD Supply is a large distributor of construction materials.

CDW — The technology products retailer priced its initial public offering at $17 per share, after lowering the expected range from $20 - $23 to $17 - $18. CDW had been taken private in 2007, but is now returning to public trading.

Repsol — The company rejected a $5 billion compensation offer from Argentina for the seizure of the Spanish energy producer's YPF unit last year. Repsol believes the amount is inadequate to make up for the value of the property seized.

BlackBerry — BlackBerry plans to offer information Friday on sales of its BlackBerry 10 devices. The company does not currently provide financial guidance, and estimates of BB10 sales of have varied widely.

Paychex — The company reported fiscal fourth quarter profit of 38 cents per share, excluding certain items, one cent above estimates, but revenues for the quarter came up short of consensus. The payroll services provided also projected growth that's short of analyst estimates.

Herman Miller — The office furniture company nearly doubled its fiscal fourth quarter profit from a year ago, yet it projected current quarter earnings below Street estimates as it grapples with weakness in the domestic government and health care markets.

Macy's —Stifel Nicolaus has started coverage of the retailer's stock with a "buy" rating, praising the company's integrated business strategy.

(Read More: See CNBC's Market Insider Blog)

—By CNBC's Peter Schacknow

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